I accidently shot a deer in the neck with an arrow. It jumped the string. I looked for hours that night and couldn't find it. The next morning I found it within minutes. It only went about 50 yards. This might be a more fatal shot than you think. I severed the jugular vein and the carotid artery and the deer was dead almost instantly. No O2 to the brain right away. My problem was that I thought it headed into the thick cover about 100 yards away. It was pouring rain so I had no blood to follow. That deer may have piled up way before you think. If it's not stone dead now, it may recover fully.